Melting points are determined using a melting-point apparatus (SMP10) in open capillaries and are uncorrected. The progress of the reactions was monitored by thin layer chromatography (Merck). Detections were achieved by UV light illumination. For flash chromatography, commercial silica was used. Nuclear magnetic resonance (1H-NMR, 13C-NMR, and 2D NMR) spectra were determined in DMSO-d6 and were recorded on Bruker AC 300/500 spectrometers using TMS as an internal standard. Chemical shifts are termed in δ (ppm) and coupling constants are described in Hz. The assignment of exchangeable OH and NH was confirmed by D2O. CHNS-microanalysis was done using a Flash EA-1112 instrument. The HREI mass spectra were detected using a Finnigan MAT 95XP. The FAB-MS was done using Jeol JMS HX110. The IR were detected using a Bruker Alpha ATR-FTIR.
Alpha ftir atr
Manufactured by Bruker
Sourced in Germany
The Alpha FTIR-ATR is a Fourier Transform Infrared (FTIR) spectrometer with Attenuated Total Reflectance (ATR) capability. It is designed for efficient infrared analysis of solid and liquid samples.
Automatically generated - may contain errors
Lab products found in correlation
Thin layer chromatography, by Merck Group (1 mentions)
Jms hx 110, by JEOL (1 mentions)
Ac 300 500 spectrometers, by Bruker (1 mentions)
Axs d8, by Bruker (1 mentions)
Jsm 6010, by JEOL (1 mentions)
Tga q500, by TA Instruments (1 mentions)
Tecnai g20, by Thermo Fisher Scientific (1 mentions)
A300 spectrometer, by Bruker (1 mentions)
D max 2500v pc diffractometer, by Rigaku (1 mentions)
10 protocols using alpha ftir atr
1
Characterization of Organic Compounds
2
Characterization and Struvite Crystallization of Mg-laden Microalgal Biochar
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The Mg-laden microalgal biochar was characterized using Fourier Transform Infrared (FTIR) Spectroscopy (MN344, Alpha ATR-FTIR, Bruker, Germany) for analysing the functional groups present. X-Ray Diffraction (XRD) analysis was carried out to study the crystalline phases of Mg-MiB with a diffractometer equipped with Cobalt-Iron radiation (AXS D8, Bruker, Germany). The surface morphology and chemical composition was elucidated using Scanning Electron Microscopy—Energy Dispersive X-ray spectroscopy (SEM–EDS) (JEOL JSM- 6480 LV, Oxford Instruments, UK). Once the struvite crystallization experiments were carried out, the quality and composition of the crystals were analysed using FTIR and SEM–EDS, respectively. The variation in particle size of struvite crystals with seeding was examined using a particle size analyzer (Mastersizer 2000, Nano ZS, Malvern, U.K.).
3
Comparative Analysis of Polymer Particles
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Because the quality of the µ-FTIR spectra in transmittance mode is dependent on the particle shape and size (e.g., very thick particles may result in the total absorption of the infrared radiation, whereas spherical particles and fibers often show disrupted spectra as a result of radiation scattering), ATR-FTIR spectroscopy was chosen as a method to compare pristine particles and the particles that underwent the enzymatic-oxidative digestion protocol. For each polymer type, respectively, 5 of the particles that underwent the enzymatic-oxidative digestion protocol were selected randomly and measured via ATR-FTIR spectroscopy (Alpha ATR-FTIR equipped with diamond crystal; Bruker Optik). For the measurement of each particle, 8 background scans were pooled, followed by 8 sample scans with a spectral resolution of 8 cm -1 in a wavenumber range of 4000 to 400 cm -1 . Using the software OPUS 7.5, the resulting spectra were compared to the spectra of untreated control particles, to determine if any changes to the functional groups in the polymer had occurred.
4
Chemical Structure Analysis of Composite Films
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The chemical structures of the CPs, UDPCs (the PE side and after peeling off PE coatings), commercial PE film, and cellulose/PE composite films were investigated by attenuated total reflectance Fourier transform infrared spectrometer (ATR-FTIR ALPHA, Bruker, Rheinstetten, Germany), in which the resolutions were 32 scans and 4 cm−1, and three spots were assessed. The Germanium (Ge) crystal had to be washed between samples by ethanol. Finally, OPUS software was used to analyze the results.
5
ATR-FTIR Analysis of Chemical Structure
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The attenuated total reflectance Fourier transform infrared spectrometer (ATR-FTIR ALPHA) purchased from the Bruker in Germany was used to study the chemical structure of samples. Germanium crystal was washed by using ethanol between samples and five spots were detected. The resolutions were 32 scans and 4 cm−1, and the results were analyzed by the OPUS software.
6
ATR-FTIR Spectroscopic Analysis of Samples
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The chemical structure of samples was studied by the attenuated total reflectance Fourier transform infrared spectrometer (ATR-FTIR ALPHA, Bruker, Rheinstetten, Germany), using a resolution of 4 cm−1 and obtaining 32 scans. Three spots were detected for each sample, and ethanol was used to clean the Ge crystal between samples. Finally, the OPUS software was employed to analyze the results.
7
Polyurethane Aging Analysis by FTIR
8
Characterization of Amorphous MSUM
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The DLS experiments were conducted at 37 °C, which was controlled by a Grant LTD-6 water bath system. The samples were measured on a Malvern Zetasizer Nano ZS90 zeta (USA). 1H NMR were measured on a Bruker AM 600 MHz spectrometer. Fourier transform infrared spectroscopy of sample was employed to be characterized by a Bruker Alpha FTIR-ATR instrument in 4 cm−1 resolution with a 4000–400 cm−1 range. Raman spectroscopy was used to characterize the structure of MSUM and a ReactRaman 0163 instrument scanned the sample from 3200 to 100 cm−1 for three times. The samples of amorphous MSUM were obtained by the same procedure as the nucleation experiments, and the sample collection time was set to the induction time based on the results of the measurement of Induction Time. And the wet sample was instantly characterized by PXRD, IR and Raman in order to avoid any effects of the phase transition. All experiments were run three times.
9
Thermal and Structural Analysis of Chitosan Hydrogels
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FTIR spectra were collected using a Bruker Alpha FTIR-ATR, using four scans on the dried gel. Dried gels were also characterized by thermogravimetric analysis utilizing a TGA Q500 (TA Instruments) under a nitrogen atmosphere with a heating rate of 10 °C/min towards a temperature of 550 °C. The surface and cross-section of the film were coated with a layer of gold/palladium for 40 s at 30 mA and imaged using a JEOL JSM-6010 scanning electron microscope.
The gel point of the Chi/HPMC/Ins solutions was determined using a stress-controlled Anton Paar MCR702 rheometer. The home-made plate–plate geometry used consisted of a roughened aluminum bottom plate connected to a Peltier plate, as well as a 25 mm diameter roughened aluminum upper plate. The plates were roughened to avoid wall slip. To closely mimic the application of the gel to a wound, it was explicitly decided not to perform any evaporation control. A time sweep at a constant strain of 0.1% and a frequency of 10 rad/s was performed at a temperature of 37 °C to determine the gel point. The gel point is defined as the time it takes for the storage modulus (G′) to reach and exceed the value of the loss modulus (G″).
The gel point of the Chi/HPMC/Ins solutions was determined using a stress-controlled Anton Paar MCR702 rheometer. The home-made plate–plate geometry used consisted of a roughened aluminum bottom plate connected to a Peltier plate, as well as a 25 mm diameter roughened aluminum upper plate. The plates were roughened to avoid wall slip. To closely mimic the application of the gel to a wound, it was explicitly decided not to perform any evaporation control. A time sweep at a constant strain of 0.1% and a frequency of 10 rad/s was performed at a temperature of 37 °C to determine the gel point. The gel point is defined as the time it takes for the storage modulus (G′) to reach and exceed the value of the loss modulus (G″).
10
Comprehensive Characterization of Nanomaterial
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Rigaku D/Max-2500 V/PC diffractometer with Cu Kα1 radiation (Cu Kα1 α = 0.154 nm, 40 kV, 40 mA, 8 °min−1) was used to analyze the crystal phase of samples. Fourier transform infrared (FTIR) spectra was analyzed by Bruker Alpha FTIR-ATR instrument. A PHI-5000 VersaProbe instrument was used to obtain X-ray photoelectron spectra (XPS). The adventitious carbon C 1s used for element correction is located at 284.8 eV. Electron spin resonance (ESR) measurement was obtained on a Bruker A300 spectrometer at room temperature. The UV-vis diffuse-reflectance spectroscopy was recorded by a UV-2600 spectrophotometer. Photoluminescence (PL) spectroscopy was analyzed on F-4600 spectrometer with excitation at 350 nm. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy were conducted on S4800 instrument. High-resolution transmission electron microscopy (TEM) and energy dispersive X-ray elemental mapping were conducted on FEI Tecnai G20.
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